Extreme postcranial pneumaticity in sauropod dinosaurs from South America

被引：0
作者：
Ignacio A. Cerda
Leonardo Salgado
Jaime E. Powell
机构：
[1] Universidad Nacional de Río Negro,Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Instituto de Investigación en Paleobiología y Geología
[2] Universidad Nacional de Río Negro,Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Instituto de Investigación en Paleobiología y Geología
[3] Universidad Nacional de Tucumán,Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Facultad de Ciencias Naturales
来源：
Paläontologische Zeitschrift | 2012年 / 86卷
关键词：
Sauropoda; Titanosauria; Upper Cretaceous; Air-sac system; Appendicular pneumaticity; Sauropoda; Titanosauria; Oberkreide; Luftsacksysteme; Appendikularpneumatisierung;
D O I：
暂无
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学科分类号：
摘要：
Birds are unique among living tetrapods in possessing pneumaticity of the postcranial skeleton, with invasion of bone by the lung and air-sac system. Postcranial skeletal pneumaticity (PSP) has been reported in numerous extinct archosaurs including pterosaurs and non-avian dinosaurs. Here we report a case of extreme PSP in a group of small-bodied, armored sauropod dinosaurs from the Upper Cretaceous of South America. Based on osteological data, we report an extensive invasion of pneumatic diverticula along the vertebral column, reaching the distal portion of the tail. Also, we provide evidence of pneumaticity in both pectoral and pelvic girdles. Our study reveals that the extreme PSP in archosaurs is not restricted to pterosaurs and theropod dinosaurs.
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页码：441 / 449
页数：8
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